http://book.klll.cc/ebooks/author/46461.opds?sort_order=title 2026-01-14T23:01:52Z Books by Oppenheimer, Franz Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2026-01-14T23:01:52Z https://en.wikipedia.org/wiki/Franz_Oppenheimer See also: en.wikipedia 2026-01-14T23:01:52Z https://book.klll.cc/ebooks/51544.opds State: Its History and Development Viewed Sociologically Franz Oppenheimer